Nakano, Takafumi. (2016). Four new species of the genus Orobdella from Shikoku and Awajishima island, Japan (Hirudinida, Arhynchobdellida, Orobdellidae). Zoosystematics and Evolution. 92(1): 79-102.

433762

10.3897/zse.91.7616 [view]

Nakano, Takafumi

2016

92(1): 79-102

Publication

https://zse.pensoft.net/article/7616/

Four new species of the genus Orobdella Oka, 1895 from the mountainous regions of Shikoku and Awajishima island, Japan are described. These new species consist of one quadrannulate, two sexannulate and one octannulate species. The quadrannulate Orobdella brachyepididymis sp. n. is a small species with a body length reaching only ca. 5 cm. The sexannulate Orobdella okanoi sp. n. was collected from Shikoku, and the other sexannulate species, Orobdella yamaneae sp. n., inhabits Awajishima island. The octannulate Orobdella nakahamai sp. n. is a large species with a body length greater than 20 cm and is only the second large octannulate species known within this genus. Phylogenetic analyses using nuclear 18S rRNA and histone H3, as well as mitochondrial cytochrome c oxidase subunit I, tRNA(Cys), tRNA(Met), 12S rRNA, tRNA(Val), 16S rRNA, tRNA(Leu) and NADH dehydrogenase subunit 1 markers, indicated that O. brachyepididymis is a sister species of the quadrannulate O. naraharaetmagarum Nakano, 2016, while the other three new species formed a clade closely related to O. masaakikuroiwai Nakano, 2014 and O. whitmani Oka, 1895. The ranges of the distant phylogenetic lineage groups of Orobdella overlap in Shikoku and adjacent islets.

Japan

Molecular systematics, Molecular biology

Annelida

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